Options expiry for the September contract on the CRIMEX is indeed August 26, 2010. I don't think September is much of a month for silver but they may try to use silver to influence gold which is what Big Bill always complains about. I doubt they will have much success this time around but I never under-estimate these manipulators especially around options expiry.
Only traders need be concerned and these times do provide opportunity for investors to buy stuff on sale.